Broadband Monitor Help

Hi,
I have been having a lot of trouble with my Sky broadband which is FTTC, I am 200 yards away from the exchange and less than 30 yards from the cabinet. I usually get a constant 78Mb download and Sky garauntee my speed at 61.9 Mb download.
Since late March my speed has dropped to 37Mb download every 24 hours and what I have to do is go into the routers maintenance settings and disconnect/reconnect the session to get my speed back up and then 24 hours later it drops again. I always tested on a cabled and wifi connection, w and after 2 Sky engineer visits and an Open Reach engineer visit nothing can be found wrong at my end, both the Open Reach and second Sky engineer told me that it was a through put fault and needed an Open Reach network engineer to fix it however all Sky have done is used their own network team to monitor the line and said that there is nothing wrong and have blamed my setup at home for the fault. On the last phone call to Sky the advisor insisted that it is a WiFi fault and constantly confused WiFi with an ethernet connection 🙄
So someone on the Sky community forum pointed me to this site and I have been running a broadband monitor but to be honest I haven't got a clue what I am looking at. I was hoping that someone here could look at the graph and tell me what's happening?
Thanks for any help.

https://www.thinkbroadband.com/broadband/monitoring/...

Edited by Del1701 (Sun 28-May-23 08:57:28)

That BQM is awful. Is there noise on the phone line?

My guess (and it is a guess) is that one of the wires in the pair feeding your house has a fault, hence the halving of your synch speed.

This would be an Openreach issue.

Thanks for your quick reply, Open Reach tested my line and said there was nothing wrong, they said that I have a constant 78Mb to the phone socket, they checked the line from the socket to the exchange and it was good 🤔

If the fault is intermittent, as it seems to be, the line could quite possibly test good when the fault isn't occurring.

I had a similar problem years ago, it was a high resistance fault. Corrosion on one leg of the line.

Check for noise when it happens. I ended up recording it to prove to the engineer what was happening.

Are you using an IPv4 or IPv6 address for your BQM?

Edit: If you're not sure then check if it starts with something like "2a02:" then its IPv6

Edited by deleted (Sun 28-May-23 10:04:03)

Although there are a lot more dropped packets (red) on that graph than there ought to be, my feeling is that that will disappear if you can get rid of the virtually solid blue- this means that the average time your router is taking to respond to a ping is greater than 150mSec (graph maximum) for some reason, and occasionally takes more than 500mSec (ie treated as a dropped packet), but otherwise seems to be working properly. Just very slowly

Why it's doing that is a good question... but an obvious point is rather than just disconnecting/reconnecting, have you tried rebooting the router? That 24 hour interval could suggest that some (probably internal) task the router performs at that interval is getting itself stuck and hogging the CPU, if so then rebooting may clear it.

The way you connect isn't entirely clear- you say: "I always tested on a cabled and wifi connection", I think you need to eliminate wifi entirely (preferably by switching it off) to see if that has any effect. If it does then it will at least tell you where to look!

And an obvious suggestion- can you try another router?

A remote possibility that occurs to me is that you could be subject to a DOS attack, but I've no idea how to check for that.

Hi Bill

I am concerned its not the router responding to the ping but a device on there network (via IPv6).

Hopefully the OP will be able to confirm.

If it's an IPv6 BQM then agreed, but do Sky support IPv6? I'm not sure.

In reply to a post by billford:

If it's an IPv6 BQM then agreed, but do Sky support IPv6? I'm not sure.

Yes, they were one of the first. The big consumer ISP that still doesn't is Virgin Media.

Edited by jchamier (Sun 28-May-23 10:53:53)

Ah, I didn't know that, thanks.

Where did the Android tablet come from, have I missed something?